Patent US3190398A successfully refreshed from Google Patents.
US3190398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spreading type disk brake
Assignee: Individual
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Filing: 1961-07-24
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Granted: 1965-06-22
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 The Detroit Bank And T Company
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:18
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/42; F16D65/46; F16D55/00; F16D55/02; F16D55/04; F16D55/06; F16D2125/00; F16D2125/18; F16D2125/58; F16D2125/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A DISK BRAKE COMPRISING A ROTATABLE MEMBER HAVING A PAIR OF SPACED ROTATABLE DISK SURFACES, A PAIR OF ARCUATE BRAKE SHOES MOVABLE AXIALLY TOWARD SAID DISK SURFACES, SAID SHOES BEING IN THE FORM OF CIRCULAR SEGMENTS OF LIMITED CIRCUMFERENTIAL EXTENT AND HAVING ARCUATE FRICTION FACES RESPECTIELY ENGAGEABLE WITH SAID DISK SURFACES IN RESPONSE TO SUCH MOVEMENT THEREOF, SAID SHOES BEING OF A STRONG RIGID CONSTRUCTION TO RESIST DISTORTION, FORCE APPLYING MEANS FOR FORCING SAID SHOES AXIALLY TOWARD SAID DISK SURFACES FOR PRESSURE ENGAGEMENT OF THEIR FRICTION FACES WITH SAID DISK SURFACES, SAID FORCE APPLYING MEANS ACTING ON EACH SHOE SO THAT THE RESULTANT FORCE ACTS ALONG A STRAIGHT LINE WHICH COINCIDES WITH THE CENTROIDAL AXIS OF THE ARC OF MEAN RADIUS OF THE FRICTION FACE OF EACH SHOE SO THAT WEAR ON THE FRICTION FACES ALONG ANY RADIAL LINE IS UNIFORM, SAID CENTROIDAL AXIS BEING SPACED FROM THE CENTER OF THE ARC OF THE FRICTION FACE OF EACH SHOE A DISTANCE EQUAL TO SPS@ R SIN 1/2 A
Claim 2
Dependent Claim
168 words
A DISK BRAKE COMPRISING A ROTATABLE MEMBER HAVING A PAIR OF SPACED ROTATABLE DISK SURFACES, A PAIR OF ARCUATE BRAKE SHOES MOVABLE AXIALLY TOWARD SAID DISK SURFACES, SAID SHOES BEING IN THE FORM OF CIRCULAR SEGMENTS OF LIMITED CIRCUMFERENTIAL EXTENT AND HAVING ARCUATE FRICTION FACES RESPECTIELY ENGAGEABLE WITH SAID DISK SURFACES IN RESPONSE TO SUCH MOVEMENT THEREOF, SAID SHOES BEING OF A STRONG RIGID CONSTRUCTION TO RESIST DISTORTION, FORCE APPLYING MEANS FOR FORCING SAID SHOES AXIALLY TOWARD SAID DISK SURFACES FOR PRESSURE ENGAGEMENT OF THEIR FRICTION FACES WITH SAID DISK SURFACES, SAID FORCE APPLYING MEANS ACTING ON EACH SHOE SO THAT THE RESULTANT FORCE ACTS ALONG A STRAIGHT LINE WHICH COINCIDES WITH THE CENTROIDAL AXIS OF THE ARC OF MEAN RADIUS OF THE FRICTION FACE OF EACH SHOE SO THAT WEAR ON THE FRICTION FACES ALONG ANY RADIAL LINE IS UNIFORM, SAID CENTROIDAL AXIS BEING SPACED FROM THE CENTER OF THE ARC OF THE FRICTION FACE OF EACH SHOE A DISTANCE EQUAL TO SPS@ R SIN 1/2 A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |